/Engine/Source/Developer/HierarchicalLODUtilities/Public/HierarchicalLODUtilities.h
Deletes all the ALODActors with the given HLODLevelIndex inside off InWorld
virtual void DeleteLODActorsInHLODLevel ( [UWorld](API\Runtime\Engine\Engine\UWorld) * InWorld, const int32 HLODLevelIndex )